What percentage of a market is SFR vs. Multi-family?

[Neil DiMuccio]

Newbie question - is there any sort of list or way to find which cities have more multi-family properties? I'm currently just trying to learn more about my local market, but also nationally as well, and finding such information would be helpful to my decision if I should invest locally or farther away. 

I'm finding there's often a small bit of inventory for multifamily on the market in any medium-or-larger city, but wanting to see which cities might have higher (relative) supplies of multifamily properties, in case I get in and decide I want to expand in that area.

Sometimes it feels like it's only SFR's out there!